Engine compartment pics
I sourced it from these guys (see link below). They have nice quality products too. If you've ever opened the cabin cowl vent on the highway, you should be aware of the high pressure air that collects in the cowl vent structure.
My passenger side vent was sealed off when I installed my Vintage Air Gen IV evaporator, but the driver's side vent is still functional. My grandsons love it when I open it up, because the intake noise from the 408 Magnum sounds great piped directly into the cabin.
https://www.ramairbox.com/parts.html